M 5.1 earthquake: North Pacific Ocean (Japan) — April 19, 1978

M 5.1 earthquake: North Pacific Ocean (Japan) — April 19, 1978. Epicenter 540 km S of Yokohama, depth 33 km, 16:32 Local (1978-04-19 07:32 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (540 km S, Japan) — 30.89, 141.656

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